:root{--bg:#0f172a;--bg-card:rgba(30,41,59,0.7);--bg-surface:#334155;--text:#f8fafc;--text-muted:#94a3b8;--primary:#38bdf8;--accent:#818cf8;--border:rgba(255,255,255,0.1);--radius:16px;--font:'Inter',sans-serif;--font-heading:'Outfit',sans-serif;--mono:'JetBrains Mono',monospace}
[data-theme="light"]{--bg:#f8fafc;--bg-card:rgba(255,255,255,0.8);--bg-surface:#e2e8f0;--text:#0f172a;--text-muted:#64748b;--border:rgba(0,0,0,0.1);--primary:#0284c7}
*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;transition:all 0.3s}
.bg-blur{position:fixed;inset:0;z-index:-1;background:radial-gradient(circle at 50% 50%,rgba(56,189,248,0.05),transparent 60%)}
.container{max-width:1100px;margin:0 auto;padding:0 1.5rem}h1,h2,h3,h4{font-family:var(--font-heading)}.text-muted{color:var(--text-muted)}.text-primary{color:var(--primary)}.text-center{text-align:center}.text-sm{font-size:0.875rem}.text-xs{font-size:0.75rem}.font-semibold{font-weight:600}.font-mono{font-family:var(--mono)}.mb-2{margin-bottom:0.5rem}.mb-4{margin-bottom:1.5rem}.mt-2{margin-top:0.5rem}.mt-4{margin-top:1.5rem}.w-100{width:100%}.flex-bw{display:flex;justify-content:space-between;align-items:center}.flex-grow{flex-grow:1}
.navbar{padding:1rem 0;margin-bottom:2rem}.nav-inner{display:flex;justify-content:space-between;align-items:center}.brand{font-weight:700;font-size:1.4rem;color:var(--text);text-decoration:none;font-family:var(--font-heading)}.brand span{color:var(--primary)}.nav-links{display:flex;gap:1.5rem;align-items:center}.nav-links a{color:var(--text-muted);text-decoration:none;font-weight:500;transition:all 0.2s}.nav-links a:hover{color:var(--primary)}.kofi-link{color:#ff5e5b!important}.icon-btn{background:none;border:none;color:var(--text);font-size:0.9rem;font-weight:500;cursor:pointer;padding:0.5rem 0.8rem;border-radius:8px;transition:background 0.2s}.icon-btn:hover{background:var(--bg-surface)}.theme-btn{border:1px solid var(--border);background:none;color:var(--text);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer}
.main-layout{display:grid;grid-template-columns:1fr 300px;gap:2rem;align-items:start}@media(max-width:850px){.main-layout{grid-template-columns:1fr}}
.glass-card{background:var(--bg-card);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}
.master-controls{display:flex;align-items:center;gap:1.5rem;padding:1.5rem 2rem}.play-btn{width:64px;height:64px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 16px rgba(56,189,248,0.3);transition:transform 0.2s}.play-btn:hover{transform:scale(1.05)}.play-btn.playing{background:var(--accent)}
.vol-slider{width:100%;height:6px;background:var(--bg-surface);border-radius:3px;outline:none;-webkit-appearance:none}.vol-slider::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--primary);cursor:pointer;transition:transform 0.1s}.vol-slider::-webkit-slider-thumb:hover{transform:scale(1.2)}
.sound-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}
.sound-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:1.25rem;display:flex;flex-direction:column;gap:1rem;transition:border-color 0.2s}.sound-card.active{border-color:var(--primary);background:rgba(56,189,248,0.05)}
.sc-header{display:flex;justify-content:space-between;align-items:center}.sc-info{display:flex;align-items:center;gap:0.75rem}.sc-icon{font-size:1.5rem;width:40px;height:40px;background:var(--bg-surface);border-radius:10px;display:flex;align-items:center;justify-content:center}.sc-title{font-weight:600;font-size:0.95rem}.sc-toggle{width:20px;height:20px;border-radius:4px;border:2px solid var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:0.8rem;color:transparent;transition:all 0.2s}.sc-toggle.on{background:var(--primary);border-color:var(--primary);color:#fff}
.sc-controls{opacity:0.5;pointer-events:none;transition:opacity 0.2s}.sound-card.active .sc-controls{opacity:1;pointer-events:all}
.presets-card h3,.timer-card h3{font-size:1.1rem;margin-bottom:0.2rem}.preset-item{display:flex;justify-content:space-between;align-items:center;padding:0.75rem;background:var(--bg-surface);border-radius:8px;margin-bottom:0.5rem;transition:transform 0.2s}.preset-item:hover{transform:translateX(4px)}.preset-info h4{font-size:0.9rem}.preset-info span{font-size:0.8rem}
.btn{font-family:var(--font);font-weight:600;padding:0.75rem 1.5rem;border:none;border-radius:8px;cursor:pointer;transition:opacity 0.2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{opacity:0.9}.btn-secondary{background:var(--bg-surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--primary)}.btn-sm{padding:0.4rem 0.8rem;font-size:0.8rem}
.select-input{padding:0.75rem;background:var(--bg-surface);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--font);outline:none}.input-text{padding:0.75rem;background:var(--bg-surface);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--font);outline:none}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.2s;z-index:100}.modal-overlay.active{opacity:1;pointer-events:all}.modal-content{transform:translateY(20px);transition:transform 0.3s}.modal-overlay.active .modal-content{transform:translateY(0)}
.footer{margin-top:4rem;border-top:1px solid var(--border);padding:2rem 0;text-align:center;font-size:0.85rem}.footer-brand span{font-weight:700}.footer-links-grid{display:flex;gap:1.5rem;justify-content:center;margin:1rem 0}.footer-links-grid a{color:var(--text-muted);text-decoration:none}.footer-links-grid a:hover{color:var(--primary)}